1 / 25

L2 Forces, Mass, Acceleration, Pressure, Review of Exponents

L2 Forces, Mass, Acceleration, Pressure, Review of Exponents. Frictionless motion Demo. 5. NEWTON’S FIRST LAW OF MOTION. Newton finished the overthrow of Aristotelian ideas. Law 1 (Law of Inertia)

sela
Download Presentation

L2 Forces, Mass, Acceleration, Pressure, Review of Exponents

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. L2 Forces, Mass, Acceleration, Pressure, Review of Exponents

  2. Frictionless motionDemo

  3. 5. NEWTON’S FIRST LAW OF MOTION Newton finished the overthrow of Aristotelian ideas. Law 1 (Law of Inertia) Every object continues in its state of rest, or of uniform motion in a straight line, unless it is compelled to change that state by forces impressed upon it. “If you leave an object alone, it has constant velocity.”

  4. Newton's concept of motion said that the natural state of an object was (a) constant velocity (b) constant acceleration (c) constant net force

  5. Inertial mass

  6. We call the change in velocity per unit time the accelerationa= Δv/ ΔtThe Δv can be in magnitude and/or direction

  7. The combination of forces that act on an object is the net force. (Only the net force is shown in the figures on this slide.) m m m This symbol means proportional to FORCE CAUSES ACCELERATION F a F a F a The acceleration of an object is directly proportional to the net force.

  8. 5. NEWTON’S SECOND LAW OF MOTION • The force in each of these equations represents the vector sum of all of the forces acting on the object of mass m. • Units of force - N and lb or

  9. slug) A slug weighs Every object possesses inertia (mass). Inertia is the sluggishness of an object to changes in its state of motion. Mass - a measure of the inertia of an object (Units - kg and 3. MASS AND WEIGHT 32 lb. • Inertia deals with how hard it is to start and stop an object.

  10. Gravitational Mass

  11. m1 m2 r Newton's Law of Universal Gravitation

  12. 2. The Universal Gravitational Constant, G

  13. At earth’s surface,F = G mMe/Re2 orW = (Gme/Re2) m or W=(g)m orweight = mass x acceleration of gravityg = 9.8 m/s2

  14. A 2 kg mass weighs:A) 2 NB) 19.6 NC) 32 ND) 105 NE) Not enough information given

  15. 2 Concepts of Mass: Equivalence of gravitational mass and Inertial massTheory of General relativity

  16. Pressure=Force/contact areaOn left, the pressure on the bottom block, i.e. the weight of the top block/contact area, is lower than the pressure on the bottom block on the right.

  17. Pressure in a fluid (including air!)

  18. Exponential Notation

  19. 1000 = 10 x 10 x 10 = 103 100 = 10 x 10 = 102 10 = 101 1 = 100 0.1 = 1/10 = 10-1 0.01 = 1/100 = 10-2 0.001 = 1/1000 = 10-3

  20. For CAPA, we write356 as 3.56E2

  21. 10-2 x 10+6 = 10410-2/106 = 10-8

More Related